also: つちのえたつ
noun
Earth Dragon (5th term of the sexagenary cycle)
Refers to the 5th year in the 60-year cycle, combining the celestial stem 戊 (Earth) and the earthly branch 辰 (Dragon). Used in historical dating and astrology.
See also: 干支
戊辰戦争は1868年に始まった。
The Boshin War began in 1868.
次の戊辰の年は2048年です。
The next Earth Dragon year is 2048.
干支 is the general term for the sexagenary cycle; 戊辰 is one specific term within it.
From the combination of the celestial stem 戊 (Earth) and the earthly branch 辰 (Dragon) in the traditional Chinese sexagenary cycle.